The objective of this study is to compare the effects of home-based exercise training (HT) with telemonitoring guidance and regular centre-based exercise training (CT) on physical fitness (PF), assessed by peak oxygen uptake, and physical activity (PA), assessed by physical activity energy expenditure (PAEE), in low to moderate risk cardiac rehabilitation (CR) patients. Secondary endpoints are cost-effectiveness, training adherence, health-related quality of life (QoL) and patient satisfaction.